TY  - JOUR
T1  - Development of Fixed-Time Artificial Insemination Through Luteinizing Hormone Peak,
Plasma Progesterone and Follicular Dynamics in Locally Adopted <i>Bos indicus</i> Cow of Azad
Jammu and Kashmir
AU - Shahid, Beenish AU - Ijaz Khan, Muhammad AU - Murtaza Hassan Andrabi, Syed AU - Nasim Khan, Muhammad AU - Haider, Shafiq AU - Hussain, Mujahid AU - Shahzad, Muhammad AU - Razzaq, Abdul 
JO  - Journal of Animal and Veterinary Advances
VL  - 19
IS  - 6
SP  - 82
EP  - 91
PY  - 2020
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2020.82.91
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2020.82.91
KW  - Estrus synchronization
KW  -Ovsynch
KW  -CIDR
KW  -LH surge
KW  -progesterone
KW  -non-descript cows
AB  - The experiments were conducted aiming to
evaluate the effect of three estrus synchronization
protocols viz. Ovsynch, CIDR and CO-Synch+CIDR on
LH Peak, Plasma P4 and follicular dynamics in a fixedtime
AI (FTAI) in locally adopted non-descript
indigenous cows. The blood samples were collected at
2 h intervals, starting at 12-108 h from post PGF2&#945; to
determine the LH surge and for P4 on day 0, 4, 7, 11 and
then once weekly for 8 weeks of estrus synchronization
and FTAI. A better synchrononyof LH peak was observed
in Ovsynch group (48.40&plusmn;0.40 h post PGF<sub>2&#945;</sub>)
compared to CIDR (71.67&plusmn;9.74 h) and CO-Synch+CIDR
(54.86&plusmn;4.71 h) protocols. The mean follicular diameter,
daily growth rate and ovulation rate did not differ
(p>0.05) among three groups. The interval between PGF<sub>2&#945;</sub>
and ovulation was lower (p>0.05) in Ovsynch group when
compared to CIDR and CO-Synch+CIDR groups. The
conception rate at first service (80%) in Ovsynch group
was significantly higher (p<0.05) compared to CIDR and
CO-Synch+CIDR groups. It is concluded that the time of
LH peak in synchronized estrus of non-descript
indigenous cows is simsilar to taht in <i>Bos
Tauruscows</i> and Ovsynch protocol induced the best
synchrony of pre-ovulatory LH surge and ovulation.
ER  -